F51.09
✓ BillableOther insomnia not due to a substance or known physiological condition
Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
⚠️ Excludes2
inheritedRules inherited from parent codes.
- • alcohol related insomnia (F10.182, F10.282, F10.982)
- • drug-related insomnia (F11.182, F11.282, F11.982, F13.182, F13.282, F13.982, F14.182, F14.282, F14.982, F15.182, F15.282, F15.982, F19.182, F19.282, F19.982)
- • insomnia NOS (G47.0-)
- • insomnia due to known physiological condition (G47.0-)
- • organic insomnia (G47.0-)
- • sleep deprivation (Z72.820)
- • organic sleep disorders (G47.-)
Clinical Description
ICD-10-CM code F51.09 represents other insomnia not due to a substance or known physiological condition. This code falls under the Mental, Behavioral and Neurodevelopmental disorders (F01-F99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 6-character code at the 5th level of specificity. This is the most specific code available in this subcategory.
Frequently Asked Questions
What is ICD-10 code F51.09?
ICD-10-CM code F51.09 is "Other insomnia not due to a substance or known physiological condition". It belongs to the category: Mental, Behavioral and Neurodevelopmental disorders (F01-F99).
Is F51.09 a billable ICD-10 code?
Yes, F51.09 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Can F51.09 be coded with other codes?
F51.09 has 7 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
Related Codes in F51.0
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)